Method of communication

Abstract

A method of communication comprising: at time=t: a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; at time=t+1: the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node.

1 . A method of communication comprising:
 At time=t:
 a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and 
 a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; 
   At time=t+1:
 the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and 
 the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node. 
   
     
     
         2 . The method in  claim 1  further comprising phase rotation pre-processing. 
     
     
         3 . The method of  claim 1  further comprising optimising a pre-processing matrix based on a post-processed SNR. 
     
     
         4 . The method in  claim 1  further comprising selecting a either a direct link or a relay link based on a post-processed SNR at the destination DSTTD receiver. 
     
     
         5 . The method in  claim 1  wherein the decoding and forwarding includes DSTTD detection. 
     
     
         6 . The method in  claim 1  further comprising channel estimating based on an orthogonal training sequence in a frame structure for each of the STBC coded signals and decoded and forwarded signal signals. 
     
     
         7 . The method in  claim 1  further comprising dividing a cell into sectors, each sector having an orthogonal frequency band, and selecting the first multiple antenna relay node and the second multiple antenna relay node within each sector. 
     
     
         8 . The method in  claim 7  further comprising forming a cluster out of a plurality of adjacent cells, wherein a first sector in a first cell and a second sector in a second cell shares the same frequency band, and wherein selecting the first multiple antenna relay node and the second multiple antenna relay node comprises selecting a relay node in the first sector that is closest to the second sector as either the first multiple antenna relay node or the second multiple antenna relay node, and selecting a relay node in the second sector that is closest to the first sector as the either the second multiple antenna relay node or the first multiple antenna relay node respectively. 
     
     
         9 . The method in  claim 1  wherein the STBC coded signals and decoded and forwarded signal signals comprise a two-path relay time-division-duplex (TDD) frame structure, wherein the frame structure includes slots for uplink data transfer, downlink data transfer feedback on phase rotation, and feedback on link selection. 
     
     
         10 . The method in  claim 1  further comprising bi-directional communication including an uplink and a downlink. 
     
     
         11 . An integrated circuit configured to communicate according to a method of communication comprising:
 At time=t:
 a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and 
 a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; 
   At time=t+1:
 the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and 
 the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node. 
   
     
     
         12 . A mobile station configured to communicate according to a method of communication comprising:
 At time=t:
 a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and 
 a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; 
   At time=t+1:
 the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and 
 the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node. 
   
     
     
         13 . A base station configured to communicate according to a method of communication comprising:
 At time=t:
 a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and 
 a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; 
   At time=t+1:
 the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and 
 the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node. 
   
     
     
         14 . A relay station configured to communicate according to a method of communication comprising:
 At time=t:
 a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and 
 a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; 
   At time=t+1:
 the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and 
 the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node. 
   
     
     
         15 . A communication system comprising
 a multiple antenna source configured to transmit STBC coded signals   at least two multiple antenna DSTTD relay nodes configured to alternatively decode and forward the STBC coded signals, and   a DSTTD receiver configured to decode the STBC coded signals and the relayed signals.